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Call 0345 2300 599EAntenna 40MDY1S
A heavy-duty 40 metre rotary dipole providing full 7MHz-band operation from a compact 10.43m structure, with high-Q loading, 3kW power handling and a 1:1 balun included.
The EAntenna 40MDY1S is a shortened, rotatable 40m dipole designed for installations where a conventional full-size 40 metre dipole would be impractical.
Its loaded construction reduces the overall length to 10.43 metres while retaining useful bandwidth and performance across the 40 metre amateur band.
EAntenna specifies the antenna for 7.0 to 7.3MHz, comfortably encompassing the UK amateur 40m allocation of 7.0 to 7.2MHz.
Designed specifically for the 40 metre amateur band.
A substantially more manageable installation than a conventional full-size 40m dipole.
Supplied with a matching 3kW 1:1 balun for direct 50Ω coaxial feed.
Heavy-duty mechanical construction for permanent mast installations.
40 Metres Without a Full-Size Dipole
A conventional half-wave dipole for 40 metres requires considerably more physical space. The 40MDY1S uses a shortened, loaded design to bring the complete antenna down to just 10.43m end to end.
This makes it particularly useful on towers and masts where a full-size 40m element would create excessive turning radius, mechanical loading or clearance problems.
High-Q Loading Coils
EAntenna uses high-Q loading coils to electrically lengthen the shortened elements while minimising the additional loss normally associated with loading a physically shortened antenna.
The 40MDY1S is derived from the longer 40MDY1 design. EAntenna states that the shortened version sacrifices only around 0.05dBi compared with the longer model while retaining approximately 130kHz of useful bandwidth.
The shortened 40MDY1S is intended for installations where the larger 40MDY1 is simply too long. The reduced 10.43m span and 5.22m turning radius make the antenna much easier to accommodate while retaining very similar on-air performance.
1:1 Balun Included
The antenna is designed for a conventional 50Ω coaxial feeder and includes a 1:1 balun rated for up to 3kW, eliminating the need to purchase a separate matching transformer.
5.22m Turning Radius
Mounted horizontally above a suitable rotator, the 40MDY1S can be turned to favour the broadside radiation pattern of the dipole towards the required direction.
Built for Permanent Outdoor Installation
EAntenna uses aluminium antenna sections together with AISI 304 stainless-steel hardware throughout the structure.
The manufacturer specifies aluminium alloys including 6061/6063 T5 and 6082 T6, selected for mechanical strength and resistance to outdoor exposure.
The antenna sections are assembled using DIN 912 screws and high-pressure end clamps, creating a rigid installation intended for long-term mast mounting.
Heavy-Duty Centre Support
The central mast attachment uses a substantial aluminium support section measuring approximately 100 × 40 × 500mm with 4mm wall thickness.
Heavy-duty M8 U-bolts and stainless-steel clamps secure the antenna to the mast, with the overall structure specified to survive wind speeds of up to 160km/h / 100mph.
Key Dimensions
Ready for a 50Ω Feedline
40MDY1S Technical Document
View the supplied technical documentation for the EAntenna 40MDY1S before installation.
View 40MDY1S Technical DocumentEAntenna 40MDY1S Technical Specifications
40MDY1S
The 40MDY1S is intended for horizontal rotary installation on a suitably rated mast, tower and rotator system.
Allow for the antenna's 10.43m overall span, 5.22m turning radius, 9kg antenna weight and expected local wind loading when selecting the supporting structure and rotator.
Shipping & Delivery
We offer UK and international delivery services, including next working day and selected weekend options for eligible orders. Available services, prices and estimated delivery times are displayed at checkout.
Delivery Information
Delivery options depend on the parcel's size, weight, contents and destination. Express and weekend services are subject to availability and cut-off times. Oversized or exceptionally heavy items may require a specialist delivery quotation.
Returns & Cancellations
To arrange a return, please contact ML&S or complete our returns form. You may also exercise your statutory right to cancel by email or another clear statement, without completing the form.
Changed Your Mind?
Under the Consumer Contracts Regulations 2013, most purchases made online or by telephone can be cancelled within 14 days of receipt.
You must notify us of your cancellation within this period and return the goods within a further 14 days.
Please handle all goods with care. Returned items must be in a resaleable condition, complete with their original packaging, and all supplied accessories.
You may inspect goods as you would in a shop. Handling beyond what is necessary to inspect them may result in a lawful deduction for diminished value.
Exceptions
Modified Equipment & Reversal Charges
Additional return conditions may apply to equipment modified at the customer's request, including wideband transmit or receive modifications.
ML&S may charge a reasonable fee to reverse physical modifications and restore the equipment to its original factory specification. Any such charge will be agreed in advance and deducted from your refund.
Custom-Made Cable Assemblies
Coaxial cable assemblies manufactured to a customer's specifications are excluded from the 14-day return policy and are non-refundable unless faulty.
Software & Labour Charges
Labour and modification charges requested by the customer are non-refundable once the work has been completed.
Computer software may only be returned under the 14-day return policy if it remains sealed and unopened.
Return Postage Charges
Customers are responsible for the direct cost of returning unwanted or incorrectly ordered goods, where permitted by law. You may arrange your own suitable return postage or use one of our optional prepaid services.
Standard Parcels
Royal Mail Return Label
£5.95
Per parcel
For eligible standard-sized parcels, subject to Royal Mail restrictions. Free collection included.
Larger Parcels
DPD Return Label
£7.95
Per parcel
For larger or heavier parcels and any shipments with batteries.
Collection Service
DPD Collection
£25.00
Per parcel
Available upon request for eligible addresses, subject to availability.
Prepaid return charges will be confirmed before booking and deducted from your refund.
These prices apply to eligible UK mainland returns. Oversized items, specialist products and returns from other destinations may require a separate quotation. Estimated return costs will be disclosed before purchase.
Faulty or Incorrectly Supplied Goods
Return postage charges do not apply to faulty, damaged or incorrectly supplied goods returned under statutory rights. ML&S will arrange a free return in these circumstances.
Refunds
Refunds are processed without undue delay following receipt and inspection of returned goods, and no later than 14 days after we receive goods returned under statutory cancellation rights.
Refunds will be issued to the original payment method. Any prepaid return postage charges or lawful deductions for diminished value will be itemised.
Warranty Terms & Conditions
New Equipment Warranty
Minimum 2-Year Warranty
All new products supplied by ML&S carry a minimum two-year warranty against manufacturing defects, excluding batteries, which are covered by separate warranty terms.
Some manufacturers provide extended warranties, such as the three-year warranty available on eligible Yaesu equipment. Any additional coverage is subject to the manufacturer's terms and conditions.
Our workshop may assess and repair faulty equipment on site or refer it to the manufacturer or an authorised service centre where necessary.
Warranty exclusions may include batteries, normal wear and tear, accidental damage, misuse and unauthorised modifications, as specified in the applicable warranty terms.
All warranties are provided in addition to your statutory consumer rights against ML&S, which are not limited by the warranty period.
International Returns & Warranty
Unless otherwise stated, ML&S warranty servicing is carried out in the UK. International customers must contact us before returning goods to confirm shipping and customs requirements.
International customers are responsible for return postage unless the goods are faulty and ML&S has been notified within a reasonable time.
ML&S accepts no responsibility for additional charges resulting from incorrectly completed customs documentation. Any additional duties charged to ML&S as a result will be billed to the customer before return of the goods.
Need Help With a Return?
Our team can assist with returns, postage arrangements, modifications and warranty claims.
Nothing in these terms excludes or limits your statutory consumer rights.
